Submission #617320

#	Time	Username	Problem	Language	Result	Execution time	Memory
617320		OttoTheDino	Carnival Tickets (IOI20_tickets)	C++17	25 / 100	899 ms	73792 KiB

tickets

#include "tickets.h"
#include <bits/stdc++.h>
using namespace std;

#define rep(i,s,e)                          for (int i = s; i <= e; ++i)
#define fi                                  first
#define se                                  second
typedef long long ll;
typedef pair<int,int> ii;
typedef vector<int> vi;

long long find_maximum(int k, vector<vector<int>> x) {
	int n = x.size();
	int m = x[0].size(), cnt[n] = {};
	vector<vector<int>> answer(n, vi(m));
    ii vals[n*m];
    rep (i,0,n-1) rep (j,0,m-1) vals[i*m+j] = {x[i][j], i};
    sort(vals, vals+n*m);
    ll tot = 0;
    rep (i,0,n*m-1) {
        if (i<n*m/2) {
            tot -= vals[i].fi;
            cnt[vals[i].se]++; 
        }
        else tot += vals[i].fi;
    }
    int id = 0;
    rep (i,0,n-1) {
        sort(x[i].begin(), x[i].end());
        rep (j,0,m-1) answer[i][j] = (id+j)%m;
        id += cnt[i];
    }
	allocate_tickets(answer);
	return tot;
}

• Subtask 1: 11 / 11
• Subtask 2: 0 / 16
• Subtask 3: 0 / 14
• Subtask 4: 14 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23
• Subtask 7: 0 / 10